3 second interruption at a bank

I was in the car at the ATM when the power blinked right in the middle of the transaction. I waited for the machine to start rebooting then I went inside to see about a new card. There were probably 30 people in the bank and most of us were wondering what happened and how soon we’d be done and back on our way. Actually my guess is that was what most people were thinking. I was thinking about the fact that I need to get back to having a few days pay in cash on hand. This was one very brief interruption and access was restored pretty quickly but it easily could have gone very badly.